Ford Super Duty engine

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Ford Super Duty V8
Manufacturer Ford Motor Company
Production 1957–1982
Configuration Big-block OHV V8
Predecessor Lincoln Y-block
Successor Ford 385 V8

The Ford Super Duty engine was a truck engine from Ford Motor Company. The Super Duty was introduced in 1958, the same year as the FE and MEL series V8 engines, as a replacement for the Lincoln Y-block in truck applications.


The Super Duty engine was built in Ford's Cleveland engine plant number 2. When Ford built the 385 series engine and started to change over a 460 or 429 weighed about half of the 477. The Super Duty was available in displacements of 401, 477 and 534 cubic inches (6.6L, 7.8L and 8.8L). The 401,477,534 engines also had 4 radiator hoses. Under full load they would run 2 miles on a gallon of gas.

during the middle 1970's Ford also marketed a 475ci engine which for all purposes was the same as the 477ci

A marine version, commonly referred to as the "Seamaster" was also available starting in the late 1950s. The Seamaster was available with twin turbochargers, and weighed over 1,300 pounds (590 kg) installed.[citation needed]


They had a unique intake system where the intake dumped into the head and all four cylinders pulled the mixture out of a log type port in the head. They could spit when cold and blow the choke plate out into the air cleaner because of the large port configuration. In later engines, this was corrected, with a modern style spider-type intake. The exhaust valves were sodium filled that liquefied when hot to carry heat away from the valve head to the valve spring that dispensed heat into the oil coming off the rocker arm.

The piston assembly weighed three times more than other gas engine manufactures. The block was unique in that it was a 90 degree v 8 but the top deck was 60 degrees. The head was flat on the combustion chamber side so by doing this they achieved a wedge combustion chamber. With this design it left a big hole so they put a large pop top piston to try to displace some volume. They used a deep skirted block for strength. They governed these at about 3400 rpm due to their great rotating mass.

The 401/6.6L produced 226 hp (169 kW) at 3600 rpm and 350 lb⋅ft (475 N⋅m) of torque at 2500-3600 rpm. The 477/7.8L produced 253 hp (189 kW) at 3400 rpm and 430 lb⋅ft (583 N⋅m) of torque at 2500-3000 rpm. The 534/8.8L produced 266 hp (198 kW) at 3200 rpm and 490 lb⋅ft (664 N⋅m) of torque at 1800-2300 rpm.


These engines were large, heavy, high torque engines and operated at a relatively low RPM. They were never designed as automobile engines and were commonly found in large, industrial use vehicles including dump trucks, garbage trucks, concrete mixing trucks, large buses and other medium and heavy duty trucks of the time.

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